Scraper



I. MOSSMAN.

SCRAPER.

APPLICATION FILED APR.24. 191s.

Patented Mar. 16, 1920.

a 4 3 2 4 a a m a v I i? g Z 0 3m n w 5% l5 4 6 m w a 3 3 mn 6 2 7 ,0 32 4 2 n H La INVENTOR 9 440 Mass MAN 35 is a view in side elevation of ascraper con- ISAAC MOSSMAN, or'mcoma, wasnmeroivf semen.

To all whom it may concern:

Be it known that I, ISAAC Moss MAN, a

citizen of the United States, residing at Tacoma, in the county ofPierce and State of Washington, have invented a new and usefulImprovement in Scrapers, of which the following is a specification. V

This invention relates to improvements scrapers of the class commonlused for moving earth in grading and filling, and the object of thisimprovement is to prov de a scraper of this class that is strong andsimple in construction, eificient in operation and easy to handle.

A further and more specific object is to provide a scraper of thisnature having a hinged bottom section that may be lowered by theoperator for the purpose of filling the scra er.

A stil further object is to provide a guard plate on the front end ofthe scraper to prevent earth from .jolting off when the scraper ishauled for a considerable distance after filling. A still further objectis to provide a scraper of this class having a hinged back portionthrough which the contents of the scraper may be discharged, the backportion serving as a leveling device to level the earth as it is dumped.v

The invention consists in the novel construction, adaptation andcombination of parts of a scraper as will be more clearly hereinafterdescribed and claimed.

In the accompanying drawings Figure 1 structed' in accordance with thisinvention; Fig. 2 is a plan view of the same; and Fig. 3 is a sectionalview on broken line 3, 3 of Fig. 2 showing certain parts in differentoperative positions.

Referring to the drawings, throughout which like reference numeralsindicate like parts, the numeral 5 indicates the bottom of a scraperbowl that is provided with two sides 6 and 7 and a back member 8. Theparts 5, 6, 7 and 8' are all formed integral or otherwise rigidlysecured together so that they constitute a rigid frame to which theremaining parts of the scraper may be secured.

Articulated with the front edge of the bottom portion 5 by means ofhinges 10 is a Specification of Letters Patent. "Patented Applicationfiled April 24, 1918. Serial to. 280,673.

Mar; 16, 192a.

blade portion 11 that is provided on its opposite ends with integrallyformed, upwardly directed members 12 and .13 that work just inside thetwo sides 6 and 7 as more clearly shown in Fig.

The top ends of the members 12 and. 13 are articulated by' pivots 14with bars 15 and 16 that extend rearwardly and are pivotally connectedwith the top ends of arms 17 and 18 that are fixedly secured to arotatable shaft 20 that extends crosswise of the rear portion of thescraper.

The central portion of the shaft 20 is keyed or otherwise fixedlysecured to a lever 21 that is movable over a quadrant 22 so that whenthe lever is in the lowered po-- sition shown in Fig. 1 the blade ortion11 will be flush with the bottom of t e scraper but when the lever israised the blade will be thrown downwardly into an .angular position asshown in Fig.3 so that when the scraper is moved forward the blade 11will dig into the earth and cause the scraper to be filled. l

The front edge of the blade 11 may be provided with a plurality ofoutwardly projecting teeth 23 of well known form that assist it. indigging into. hard and rocky earth.

This scraper is preferably providedon both sides with runners 24 and-25of the well known Fresno scraper type which are of substantially theshape shown in the accompanying drawings and have a plate 26 secured tothe lower front portions thereof and extending upwardly substantially adistance equal to about onehalf the depth of the scraper. The plate 26is .notched as at 27 to provide recesses for the teeth 23 and such plateserves to prevent the contents of the scraper from jolting off at thefront end when the scraper is hauled. over rough ground after beingfilled. The upper portion of the runners 24 and 25 are strengthened andbraced by a cross bar 29.

Thescraper may be provided with a bail 28 of the usual form by which itmay be hitched to a source of power and the opposite ends of the scraperare provided at the points shown with rigid cross bar 29 that engageswith the bail 28 and serves as a too" far when it is dum'ped.

cured to the central portion of the bottom plate 5 of the scraper andmay be used as an auxiliary; hitching point when the scraper is beingused in hard ground. The front platel26 is necessarily slotted as-at 44to admit the passage of the cable or rod that is secured to the lug 45.

That portion of the rear wall of the scraper below the cross member 8;and herein designated by the numeral 32 is rigidly connected at each ofits upper corners with *archedfinembeirs 33 and 34 that are pivoted .alug 36 that isv connected to the upper portions of the scraper sides 6 vand? by pivots 35 in such manner that the portion 32. will swingoutwardly without .digging into the ground as shown in Fig. 3

and the lower ed thereof will be lifted a slight distance 0 of theground to permit the discharge of the contents of the scraper I and toserve tolevel and spread such contents out as it is discharged. The rearwall portion 32 is provided with b a link 37 with "alever '38- that isadjustahly. movable over a quadrant 40 and by which the swinging portion32 may be moved into an open or a closed position.

In operation when the scraper is to be filled-the lever 21 is raisedthereby throwing the front edge of the blade 11 downward as shown inFig. 3-, and causing it to dig into the ground and fill the scraper.After the scraper is filled the lever 21 is moved down-'. ward and theblade 11 raised. The scraper may then be hauled to any desired dumpingoint, the plate 26 preventing the material om 'jolting oil at the frontside of the scraper. v 1

-When the scraper is to be emptied the lever 38 is lifted and theswinging'rear wall portion 32 is moved outwardly into the position shownin Fig. 3 thus permitting the material to discharge through the openingin the rear end of the scraper.

If it is desired to dump thescraper when on level ground, this may bedone in the usual manner bylifting up om'the levers 21 and 38 andturning the scraper'over, the bail 28 engaging with the cross bar 29 andpreventing the scraper from turning over far enough to cause the levers21 and 38 to strike the ground. 1 When it is desired to pull dirt up anincline or up to the edge of an incline, the bail 28 on which the pullis exerted will cause the lugs30 and 31 to come in contact withprojections provided upon means at the dump and thus arrest the forwardmovement of the. scrapper and cause said scraper to tilt downwardly andautomatically dump.

The scraper can then be returned to its normal position by tensionhaul-back line. Manifestly changes in the form of conapplied to therigidly connected by edge of said bottom wall section and norstructionof the various parts of this scraper may be made within the scope of thefollow- 7 in claims.

at I claim and desire to protect by Let ters Patent is 1. A scraper ofthe class described comprising a scraper bowl having two side wallsbottom and rear walls, a scra er blade hinged to the front edge of-thebottom wall, means for adjusting t e blade to a position to facilitatefilling o the bowl and means for discharging t e contents of'the bowlfrom the rear thereof.

2. A scraper of the class described comprising a bodyportion formed oftwo sides rigidly connected by back and bottom members a blade sectionhinged to the front edge of t e bottom section, a rearwardly swingingdoor mounted in the back section, means for regulating the an larposition of the blade to facilitate filling of the bowl and means fornormally retaining the said door I with each other by bottom and rearwall sections, a scraper blade hinged; to the front mally formin a partof the scraper bottom, means for adjusting the angular position of saidscraper blade, runners on each side of said scraper-bowl and projectingin front of and above said bowl and a plate extending between saidrunners and co-acting with said hinged blade to prevent thespilling ofmater1al.

4. A scraper comprising a bowl having two side Walls that are rigidly.connecte With each other by bottom and} rear wall sections, a scraperblade hinged to the front edge of said bottom wall section and normallyforming a part ofthe scraper bottom, integral arms projecting upwardlyon opposite ends of said scraper blade in close proximity to the ends ofsaid scraper bowl, links pivotally connected at their forward ends -withthe upper ends of said arms, a shaft rotatably mounted in the rearportion of said scraper, arms fixedly secured to said shaft the upperends of said arms being .pivotally connected with the rear ends of saidlinks, a lever for rotating said shaft raise and lower the cutting edgeof said scraper blade, runners on each slde of said scraper bowl andprojecting in front of and above said bowl, and a plate extendingbetweensaid runners and co-acting with said adjustable blade to preventspilling -of 125 material.

.5, The combination with! a scraper bowl having two sides that arerigidly connected with each other b a bottom wall section and aback'wall sectlon that extends crosswise 130 as v between the twouppermost rear corner por= tions of said side Walls, of a swinging rearend section, arms secured to the upper edge of said rear end section andpivotally connected with the ends o fj said scraper bowl at a point infront ofiaid rear end seotion, and a lever for moving said rear endsection rearwardly about its pivot to dump said scraper, the lower edgeof said rear end section serving to level the material discharged 10from said scraper.

Signed by 'me at Tacoma, Washington, this 6th day of April, 1918.

ISAAC MOSSMAN.

Witnesses:

R. J. CooK, D. O. KUHNB.

